On Mon, Mar 13, 2017 at 01:41:36PM +0100, Christian König wrote:
> From: Christian König
>
> Try to resize BAR0 to let CPU access all of VRAM.
>
> Signed-off-by: Christian König
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h| 1 +
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 29 +++
rg; dri-de...@lists.freedesktop.org;
platform-driver-...@vger.kernel.org; Christian König; helg...@kernel.org;
amd-gfx@lists.freedesktop.org
Subject: RE: [PATCH 4/4] drm/amdgpu: resize VRAM BAR for CPU access
Thanks for your info.
I see.
Regards,
Jerry (Junwei Zhang)
Linux Base Graphics
SRDC Software D
017 10:41 PM
To: Alex Deucher
Cc: Zhou, David(ChunMing); Ayyappa Ch; linux-...@vger.kernel.org;
linux-ker...@vger.kernel.org; dri-de...@lists.freedesktop.org;
platform-driver-...@vger.kernel.org; Christian König; helg...@kernel.org;
amd-gfx@lists.freedesktop.org
Subject: RE: [PATCH 4/
2017 17:29
> >> To: Zhou, David(ChunMing); Ayyappa Ch
> >> Cc: linux-...@vger.kernel.org; linux-ker...@vger.kernel.org; amd-
> >> g...@lists.freedesktop.org; platform-driver-...@vger.kernel.org;
> >> helg...@kernel.org; dri-de...@lists.freedesktop.org
> >>
Ming); Ayyappa Ch
>> Cc: linux-...@vger.kernel.org; linux-ker...@vger.kernel.org; amd-
>> g...@lists.freedesktop.org; platform-driver-...@vger.kernel.org;
>> helg...@kernel.org; dri-de...@lists.freedesktop.org
>> Subject: Re: [PATCH 4/4] drm/amdgpu: resize VRAM BAR for CPU access
>>
&
rnel.org; amd-
> g...@lists.freedesktop.org; platform-driver-...@vger.kernel.org;
> helg...@kernel.org; dri-de...@lists.freedesktop.org
> Subject: Re: [PATCH 4/4] drm/amdgpu: resize VRAM BAR for CPU access
>
> Yes, exactly that.
(I'm not familiar with PCI too much.)
Is there any restrict for
.org; platform-driver-...@vger.kernel.org;
> helg...@kernel.org; dri-de...@lists.freedesktop.org
> Subject: Re: [PATCH 4/4] drm/amdgpu: resize VRAM BAR for CPU access
>
> Carizzo is an APU and resizing BARs isn't needed nor supported there.
> The CPU can access the full stolen VR
No, we resize the BAR on the fly during driver load without help from
the BIOS or VBIOS.
Christian.
Am 15.03.2017 um 11:42 schrieb Ayyappa Ch:
It also needs any support from VBIOS side ? I mean PCIe large bar support?
Thanks,
Ayyappa.
On Wed, Mar 15, 2017 at 1:07 PM, Christian König
wrote:
It also needs any support from VBIOS side ? I mean PCIe large bar support?
Thanks,
Ayyappa.
On Wed, Mar 15, 2017 at 1:07 PM, Christian König
wrote:
> Carizzo is an APU and resizing BARs isn't needed nor supported there. The
> CPU can access the full stolen VRAM directly on that hardware.
>
> As
ch 15, 2017 3:38 PM
To: Ayyappa Ch
Cc: linux-...@vger.kernel.org; linux-ker...@vger.kernel.org;
amd-gfx@lists.freedesktop.org; platform-driver-...@vger.kernel.org;
helg...@kernel.org; dri-de...@lists.freedesktop.org
Subject: Re: [PATCH 4/4] drm/amdgpu: resize VRAM BAR for CPU access
Carizzo is a
l.org;
amd-gfx@lists.freedesktop.org; platform-driver-...@vger.kernel.org;
helg...@kernel.org; dri-de...@lists.freedesktop.org
Subject: Re: [PATCH 4/4] drm/amdgpu: resize VRAM BAR for CPU access
Carizzo is an APU and resizing BARs isn't needed nor supported there.
The CPU can access the f
Carizzo is an APU and resizing BARs isn't needed nor supported there.
The CPU can access the full stolen VRAM directly on that hardware.
As far as I know ASICs with support for this are Tonga, Fiji and all
Polaris variants.
Christian.
Am 15.03.2017 um 08:23 schrieb Ayyappa Ch:
Is it possibl
Is it possible on Carrizo asics? Or only supports on newer asics?
On Mon, Mar 13, 2017 at 6:11 PM, Christian König
wrote:
> From: Christian König
>
> Try to resize BAR0 to let CPU access all of VRAM.
>
> Signed-off-by: Christian König
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h| 1 +
>
On Mon, Mar 13, 2017 at 2:41 PM, Christian König
wrote:
> From: Christian König
>
> Try to resize BAR0 to let CPU access all of VRAM.
> +void amdgpu_resize_bar0(struct amdgpu_device *adev)
> +{
> + u32 size = max(ilog2(adev->mc.real_vram_size - 1) + 1, 20) - 20;
> + int r;
> +
> +
From: Christian König
Try to resize BAR0 to let CPU access all of VRAM.
Signed-off-by: Christian König
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h| 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 29 +
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 8 +---
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